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<p>Hello,</p>
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<p>Recently migrated from Fedora34 to Fedora36, using PETSc I have some lag during the PetscInitialize, which</p>
<p>disappeared if I run again immediately the binary. But after few seconds, the lag happens again (see below).</p>
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<p>I suspected MPICH 4.0.2 on Fedora36, but a small reproducer indicated the issue is not in MPI_Init but really during PetscInitialize<br>
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<p>Just annoying during testing, not very important, but did someone already see this ?</p>
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<p>Thanks,<br>
</p>
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<p></p>
<div>portable: /volatile/ledacp/petsc/src/ksp/ksp/tests (main) > time ./ex39<br>
<br>
<span style="color: rgb(255, 0, 0);">real 0m3,593s</span><br>
user 0m0,872s<br>
sys 0m0,433s<br>
portable: /volatile/ledacp/petsc/src/ksp/ksp/tests (main) > time ./ex39<br>
<br>
real 0m0,310s<br>
user 0m0,884s<br>
sys 0m0,023s<br>
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<div># Wait ~20 seconds then again:<br>
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<div>portable: /volatile/ledacp/petsc/src/ksp/ksp/tests (main) > time ./ex39<br>
<br>
<span style="color: rgb(255, 0, 0);">real 0m3,507s</span><br>
user 0m0,897s<br>
sys 0m0,025s<br>
portable: /volatile/ledacp/petsc/src/ksp/ksp/tests (main) > time ./ex39<br>
<br>
real 0m0,154s<br>
user 0m0,725s<br>
sys 0m0,015s<br>
portable: /volatile/ledacp/petsc/src/ksp/ksp/tests (main) > time ./ex39<br>
<br>
real 0m0,176s<br>
user 0m0,875s<br>
sys 0m0,021s<br>
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<div class="PlainText">Pierre LEDAC<br>
Commissariat à l’énergie atomique et aux énergies alternatives<br>
Centre de SACLAY<br>
DES/ISAS/DM2S/STMF/LGLS<br>
Bâtiment 451 – point courrier n°43<br>
F-91191 Gif-sur-Yvette<br>
+33 1 69 08 04 03<br>
+33 6 83 42 05 79</div>
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